Lethe diana
In 3 days ~20% in a week ~40%
Lethe diana, the Diana treebrown, is a brush-footed butterfly (subfamily Satyrinae) in the family Nymphalidae. Its wings are a dark shade of brown, with an eyespot pattern, and a wingspan of about 45–55 mm. It resembles Lethe confusa; however, the Lethe confusa bears a white band on its wings, setting them apart. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tokyo | 🇯🇵 Japan |
With luck
About 10% of wildlife watchers report a Diana Treebrown sighting in Tokyo on a given day, based on 122 verified sightings from GBIF citizen-science data. It is the 141st most-seen of the 1013 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
April–July and September
In those months about 10% of wildlife watchers report a Diana Treebrown in Tokyo on a given day, against under 5% in August and October–March, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Diana Treebrown sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Tokyo, in our data
Tokyo is the only city on Wallace's Line with enough records to rate Diana Treebrown sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Diana Treebrown is recorded against all the insects logged in Tokyo (122 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
